<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<script type="text/javascript">
		
	//地龟
	//递归
	var al = 'asdjaklds'
	b = al.replace('d','l');
	l = b.replace('d','l');
	alert(l)
	//alert(a.replace('d','l'));
	
</script>
</body>
</html>